Standard Blower System With MVP (Manhole Ventilation Passthru) Allegro's Complete Ventilation Systems include all the most-asked-for equipment you need for your confined space site. The systems include a choice of Allegro's most popular blowers, six feet and fifteen feet of ducting with a storage bag and a Manhole Ventilation Passthru (MVP). The Centrifugal Blower Systems offer lightweight portability with the highest output available. See individual blower descriptions for CFM, weight and other specifications.
9520-04M AC Standard Blower System.
9520-50M High Output Blower System.
9520-05M Gas Blower System (Subaru).
9520-07M 2-Speed Blower System With MVP.
9520-03M Ex Blower System.